loginservlet.java

用java+Ajax做的图书商城

package shoppcart;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;

public class LoginServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=UTF-8";

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }
    public void doGet(HttpServletRequest request, 
                      HttpServletResponse response) throws ServletException, IOException {response.setContentType(CONTENT_TYPE);
        PrintWriter out = response.getWriter();
        request.setCharacterEncoding("UTF-8");
        String userName=request.getParameter("userName");
        String psw=request.getParameter("psw");
        response.setContentType("text/xml;charset=UTF-8");
        response.setHeader("Cache-Control","no-cache");
        HttpSession session=request.getSession(true);
        User user=new User(userName,psw);
        if(user.search()){
            session.setAttribute("user",user);
        }else{
            out.println("Error");
        }
        out.close();
    }

    public void doPut(HttpServletRequest request, 
                      HttpServletResponse response) throws ServletException, 
                                                           IOException {
    doGet(request,response);
    }
}